Why can't I increase my text and image size ?

I just got a t61 with a 15" widescreen. the writing and images on the screen are TINY to the point I can barely use the computer (or at least don't want to..) I've tried changing the screen settings but if I lower the resolution every thing looks really jagged and a bit blurry. increasing the dpi only made the tab headline bold and bulky but did not affect anything else. Am I doomed to get a headache every time I use my brand new laptop?
 
sad I’m sad and frustrated
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